674-7017. Exhaust V-Band Clamp. Application Summary: Mack 2020-73, Mack 1963-38. This direct replacement exhaust clamp matches the fit and function of the original equipment clamp. Manufactured from quality materials for a long service life, it has undergone industry standard testing to ensure reliable performance. Ideal replacement - this exhaust clamp matches the fit and function of the original equipment clamp. Durable construction - this exhaust clamp is engineered for durability and made from quality materials for a long service life. Cost-effective solution - offers original equipment performance at competitive price. Quality tested - this part has undergone rigorous testing to ensure reliable performance.